zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/app/e2fsprogs/e2fsprogs-1.42.9/lib/ext2fs/unlink.c b/ap/app/e2fsprogs/e2fsprogs-1.42.9/lib/ext2fs/unlink.c
new file mode 100644
index 0000000..d2d31cc
--- /dev/null
+++ b/ap/app/e2fsprogs/e2fsprogs-1.42.9/lib/ext2fs/unlink.c
@@ -0,0 +1,100 @@
+/*
+ * unlink.c --- delete links in a ext2fs directory
+ *
+ * Copyright (C) 1993, 1994, 1997 Theodore Ts'o.
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the GNU Library
+ * General Public License, version 2.
+ * %End-Header%
+ */
+
+#include "config.h"
+#include <stdio.h>
+#include <string.h>
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#include "ext2_fs.h"
+#include "ext2fs.h"
+
+struct link_struct {
+ const char *name;
+ int namelen;
+ ext2_ino_t inode;
+ int flags;
+ struct ext2_dir_entry *prev;
+ int done;
+};
+
+#ifdef __TURBOC__
+ #pragma argsused
+#endif
+static int unlink_proc(struct ext2_dir_entry *dirent,
+ int offset,
+ int blocksize EXT2FS_ATTR((unused)),
+ char *buf EXT2FS_ATTR((unused)),
+ void *priv_data)
+{
+ struct link_struct *ls = (struct link_struct *) priv_data;
+ struct ext2_dir_entry *prev;
+
+ prev = ls->prev;
+ ls->prev = dirent;
+
+ if (ls->name) {
+ if ((dirent->name_len & 0xFF) != ls->namelen)
+ return 0;
+ if (strncmp(ls->name, dirent->name, dirent->name_len & 0xFF))
+ return 0;
+ }
+ if (ls->inode) {
+ if (dirent->inode != ls->inode)
+ return 0;
+ } else {
+ if (!dirent->inode)
+ return 0;
+ }
+
+ if (offset)
+ prev->rec_len += dirent->rec_len;
+ else
+ dirent->inode = 0;
+ ls->done++;
+ return DIRENT_ABORT|DIRENT_CHANGED;
+}
+
+#ifdef __TURBOC__
+ #pragma argsused
+#endif
+errcode_t ext2fs_unlink(ext2_filsys fs, ext2_ino_t dir,
+ const char *name, ext2_ino_t ino,
+ int flags EXT2FS_ATTR((unused)))
+{
+ errcode_t retval;
+ struct link_struct ls;
+
+ EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
+
+ if (!name && !ino)
+ return EXT2_ET_INVALID_ARGUMENT;
+
+ if (!(fs->flags & EXT2_FLAG_RW))
+ return EXT2_ET_RO_FILSYS;
+
+ ls.name = name;
+ ls.namelen = name ? strlen(name) : 0;
+ ls.inode = ino;
+ ls.flags = 0;
+ ls.done = 0;
+ ls.prev = 0;
+
+ retval = ext2fs_dir_iterate(fs, dir, DIRENT_FLAG_INCLUDE_EMPTY,
+ 0, unlink_proc, &ls);
+ if (retval)
+ return retval;
+
+ return (ls.done) ? 0 : EXT2_ET_DIR_NO_SPACE;
+}
+